I don't recall any big mistake incident(s). But there was a humorous incident when we had an early group (6:00 a.m.) of physicians who witnessed my boss' African Parrot, "Crumpet" get lose from his office cage, and trotted all the way to my desk while the doctors were checking in. Crumpet jumped on my typewriter keyboard and had fun clicking the keys. It slowed down the check-in process due to the doctors laughing and watching Crumpet's behavior.